*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'Hiragino Sans GB', 'Arail';
}

.clearfix::after {
    content: '';
    clear: both;
    display: block;
}

a {
    text-decoration: none;
    color: #474747;
}

li {
    list-style: none;
}

div {
    display: block;
}

.course{
    width: 100%;
    background: #eee;
}

.header{
    width: 100%;
    height: 44px;
    background-color: #fff;
    padding-top: 5px;
    border-bottom: 1px solid #eee;
    position: relative;
}

.header .all{
    text-align: center;
    font-size: 17px;
    line-height: 35px;
    color: #333;
}

.header a{
    position: absolute;
    top: 0;
    right: 0;
    margin: 13px 15px 0 0; 
}

.header a img{
    width: 14px;
    height: 14px;
}

.container{
    display: block;
    width: 100%;
    height: 100%;
    background-color: #fff;
}

.container .left-title{
    width: 25%;
    height: 100%;
    float: left;
    background-color: #fff;
}

.container .left-title ul li{
    display: block;
    text-align: center;
    background: #f0f0f0;
    font-size: 12px;
    height: 40px;
    line-height: 40px;
}

.active{
    background: #fff!important;
    border-left: 2px solid #ef4040;
}


/* ------------------------------------------------- */

.container .right-sort{
    display: block;
    width: 75%;
    float: right;
    padding: 0 10px;
}

.right-sort .head{
    width: 100%;
    height: 60px;
    margin-top: 15px;
    position: relative;
    background: url(../img/sort-head-pic.jpg) center center no-repeat;
}

.right-sort .head .art-class{
    font-size: 18px;
    color: #fff;
    font-weight: bold;
    position: absolute;
    left: 76px;
    bottom: 16px;
}

.right-sort .head .pic{
    display: inline-block;
    width: 17px;
    height: 17px;
    background: url(../img/icon_more_head.jpg) no-repeat 50%;
    background-size: 17px;
    margin-left: 10px;
    position: absolute;
    top: 25px;
    right: 20px;
}

.right-sort .title{
    width: 100%;
}

.right-sort .title .kind{
    display: inline-block;
    width: 100%;
    font-size: 13px;
    line-height: 14px;
    padding: 10px 0;
    background-image: url(../img/down.jpg);
    background-repeat: no-repeat;
    background-position: right 16px;
    background-size: 13px 6px;
}

.up{
    background-image: url(../img/up.jpg)!important;
}

.right-sort .title ul{
    width: 100%;
    overflow: hidden;
    border-top: 1px solid #eee;
    border-left: 1px solid #eee;
    display: none;
}

.right-sort .title ul li{
    width: 33.3%;
    line-height: 44px;
    text-align: center;
    border-right: 1px solid #eee;
    border-bottom: 1px solid #eee;
    float: left;
}

.right-sort .title ul li a{
    font-size: 12px;
    color: #474747;
}

.show{
    display: block!important;
}


.foot{
    width: 100%;
    margin-top: 9px;
    position: fixed;
    left: 0;
    bottom: 0;
}

.foot ul{
    width: 100%;
    height: 61px;
    border-top: 1px solid #eee;
    background-color: #fff;
    display: flex;
}

.foot ul li{
    width: 25%;
    text-align: center;
    position: relative;
}

.foot ul li span{
    display: inline-block;
    width: 100%;
    font-size: 12px;
    color: #474747;
    position: absolute;
    bottom: 7px;
    left: 0;
}


.foot ul li a{
    display: block;
    height: 50px;
    line-height: 50px;
    cursor: pointer;
}

.foot ul li img{
    width: 20px;
    height: 20px;
} 